Nat. Hazards Earth Syst. Sci., 17, 887–904, 2017 https://doi.org/10.5194/nhess-17-887-2017 © Author(s) 2017. This work is distributed under the Creative Commons Attribution 3.0 License. A 240-year history of avalanche risk in the Vosges Mountains based on non-conventional (re)sources Florie Giacona1, Nicolas Eckert2, and Brice Martin1 1Centre de recherche sur les Économies les Sociétés les Arts et les Techniques, Université de Haute Alsace, Mulhouse, 68093, France 2UR ETNA, Irstea Grenoble/Université Grenoble Alpes, Saint Martin d’Hères, 38402, France Correspondence to: Florie Giacona (fl
[email protected]) Received: 18 December 2016 – Discussion started: 19 December 2016 Revised: 27 April 2017 – Accepted: 1 May 2017 – Published: 16 June 2017 Abstract. Despite the strong societal impact of moun- 1 Introduction tain risks, their systematic documentation remains poor. Therefore, snow avalanche chronologies exceeding several Databases summing up observations of past events play a decades are exceptional, especially in medium-high moun- crucial role in evaluating the expected frequency and severity tain ranges. This article implements a combination of his- of natural hazards. However, they are typically sparse in their torical and geographical methods leading to the reconstruc- coverage. Their comprehensiveness is hampered by multiple tion, at the scale of the entire Vosges Mountains (north-east factors, including (i) a close link to vulnerability (especially of France), of more than 700 avalanches that have occurred events with human casualties), which results in an underrep- since the late eighteenth century on 128 paths. The clearly resentation of geophysically significant events that did not episodic nature of the derived geo-chronology can be ex- cause damage or fatalities; (ii) a relatively short temporal plained by three interrelated factors that have changed to- coverage; and (iii) incomplete spatial coverage that excludes gether over time: the body and reliability of sources, social large regions.